While the master regulator gene Sry on the mammalian Y chromosome controls the switch for initiating male sex differentiation. many other species rely on environmental factors for gonadal sex differentiation. Yet other species. like zebrafish. https://www.ngetikin.com/limited-value-Sapatilha-Infantil-Pampili-Bailarina-Laco-Duplo-Glitter-Prata-great-pick/